Phonograph attachment



June23, 1931. K. EFTIHIOS 1,311,003

' PHQNOGRAPH ATTACHMENT :Filed Marph 21. 1923 2 snags-sneer 1 INVENTOR.libs-mos E'fhhws,

ATTORNEY.

June 23, 1931. K. EFTIHIOS PHONOGRAPH ATTACHMENT Filed March 21. 1929 2She e ts-Sheet 2 W "Illlllllllllllluh a0 I i INVENTOR, ifismoaflfiihios,

BY v

2c ing drawings wherein Patented June 23, 1931- UNITED STATES PATENTOFFICE KOSMOS EFTIHIOS, OF NEW ORLEANS, LOUISIANA PHONOGRAIPE ATTACHMENTApplication filed. March 21, 1929. Serial No. 348,947.

Thisinvention relates to an attachment for phonographs, moreparticularly to a double tone arm attachment therefor, and has for itsprimary object to provide, in a manner as said, in which each of thearms is provided with a reproducer and stylus and wherein the styli areada ted to be alternately applied to a record at su stantiallydiametrically op posite points thereof.

With the foregoing and other objects in view, the invention consists ofthe novel construction, combination and arrangement of parts ashereinafter more particularly described, and as illustrated in theaccompanyare shown embodiments of the invention, but it is to be understood that such description and drawings are to be taken as illustrativeand that the invention is intended to be limited only by the of theclaim hereunto appended.

2 sctifie the accompanying drawings in which like numerals are employedto designate like parts throughout the same: Fi re 1 is ato plan of aphonograph '80 showing an embodiment of my invention in associationtherewith.

Figure 2 is a section taken on line 2-2 of Figure 1 Fi 're 3 is a viewsimilar to Figure 1 showing a modified form of my invention. Figure 4 isa rear elevation of the form illustrated in Figure 3.

Referring. to the drawin s in detail the 'numeral 1 designates aphonograph body having a record 2 in operative position thereon.Adjacent the rearward edge thereof, the body 1 is provided with a pairof tone arm bases 3 and 4 for respectively connecting a pair of tonearms 5 and 6 with the body 1. The tone arm- 5 is provided at its forwardend with a reproducer 7 having a stylus- 8. The reproducer 7 may beconnected with the tone arm 5 in any well known manner.

The tone arm'6 is of materially greater length than the tone arm 5 andis provided at its forward end with a reproducer 9 havinga stylus 10.Projecting from the back 11 of the reproducer 9 is a collar 12 which isformed with a circumferentially disposed groove 13 extending over aportion of its circumference. Communicating with the groove 13 at oneend thereof is a right angularly disposed groove 14 which extendsthrough the free edge of the collar 12. Adjacent the opposite end of thegroove 13, the

collar 12 is provided with a depression 15 and in spaced relation to thedepression 15, circumferentially of the collar, the latter is providedwith a similar depression 16.

The tone arm 6 is connected with the re producer 9 by means of a head 17formed on the forward end of the tone arm and provided with a pair ofcencentrically arranged, spaced annular flanges 18 and 19. Disposedbetween the flanges 18 and 19 is a spring 20, one end of which issecured to the flange 19 by means of a suitable stud 21, and the otherend of which is secured to a neck portion 22 of a pin 23. The outer endof the pin 23 extends through an opening 24 through the flange 18 andthe inner end of the pin 23 is of tapered formation and extends throughan opening 25 through the flange 19.

With the ends of the spring 20 so secured, the central portion thereofbears against the inner face of the flange 18, as indicated at 26, andthe resiliency of the spring normally exerts an inward pressure on thepin 23.

In assembling the reproducer 9 and head 17 the pin 23 is brought intoalignment with the groove 14, after which the collar 12 is insertedwithin the flange 19, and therep-roduceris rotated with respect to thehead to bring the inner end 'of the pin 23 within the groove 13. Whenthe reproducer 9-is rotated with respect to the head 17 to bring theinner end of the pin 23 into engagement with the depression 15, thestylus 10 will be projected from the reproducer in the usual manner, orin other words, in the manner in which the stylus 8 projects from therepro ducer 7 of the tone arm 5 as illustrated in Figure 1. By a furtherrotation of the reproducer 9, so as to bring the inner end of the pin 23into the depression 16, the stylus will be projected from the reproducer9 in the manner as indicated in Figure 1 so as to incline in thedirection of travel of the grooves in the record 2 when the latter is toa record at aligned rotating in a clockwise direction, whereby thestylus 10 may be applied to the record at a point thereon substantiallydiametricall 0 posite to the point of application of tl ie stylus 8.

In the operation of my attachment, one of the tone arms, for instancethe arm 5 is positioned in a manner to apply the stylus 8 to the record2 to reproduce the record. The tone arm 6 is then positioned in a"manner to bring the stylus 10 at rest on the marginal portion 27 of therecord adjacent the'outermost convolution of the grooves therein, Whereit remains during the re roduction of the record through the use of tlfe stylus 8.

en the entire ICQId has been reproduced through the reproducer 7, thetone arm 6 'is manually pushed slightly inwardly Ito t e engage thestylus 10 with the grooves an record 'is immediately reproduced throughthe reproducer 9. By alternately appl ing the styli 8 and 10 to therecord in the above manner, the record may be played-continuously andindefinitel v The embodiment -1llustrated in Figures 3 and 4 is the sameas that above described, except that only one tone arm base 28 isutilized. Mounted on the base 28 is'an attachment 29 which is providedwith a pair of socket forming members 30 and 31. Respectively mounted onthe socket forming members 30 and 31. is a pair of tone arms 32 and 33,which engage the socket forming members'in the same manner as the tonearms 5 and 6 en go the tone arm bases 3 and 4 in the embodimentillustrated in, Figure 1.

It is thought that the many advantages springto project throu h theinnermost of said openings, a'collar formed on the reproducer andextended within the innermost of said flanges, said collar havin itsperiphery formed with a pair of spaced depressions for the selectivereception therein of the inner end of said pin to resiliently lock thehead and reproducer against relative rotation, said depressions beingdisposed at equal distances from and on opposite sides of a plane passedthrough the stylus and perpendicular to the plane through which thestylus is movable to extend the same at said forward and rearwardinclinations.

In testimony whereof, I aflix my signature hereto.

KOSMOS EFTIHIOS.

of an attachment in accordance with this 1n-' vention will be readily aparent, and although the preferred em=b lments are as illustrated anddescribed, it is to be understood that various changes in the size, andarrangement of parts ma lon as such changes fall wit in the scope of theinvention as defined in the appended claim.

What I claim is: a

In a phonograph, a tone arm, a sound reproducer having a stylus forengagement with a'record, and coacting means on said tone-arm andreproducer for adjustabl securing the latter with the stylus selectivelyshape be made, so

extending at forward and rearward inclinations whereby the reproducermay be applied diametrically opposite points thereof, said securin meansincluding a head on the tone arm and ormed with spaced, concentricallyopenings, a spring disposed between the flanges, a pin extendinoutermost of said openings an forced y said arranged flanges providedwiththrou h the

